The equipment is mainly composed of pay-off device, drawing machine, annealing device, tension controller, take-up and traverser, and electronic control system.
4.1 Pay off
The pay-off of the multiwire drawing machine is a rack type in which the number of pay-off can be matched according to the number of wires. The pay-off speed can reach up to 250m/min, which can meet the pay-off requirements of multiwire drawing machine at high speed.
4.2 Drawing machine
The drawing machine controls 8 wires as a basic unit, 16 wires as a double-layer arrangement, or control 7 wires as a basic unit, 14 wires as a double-layer arrangement. The drawing dies are designed in a tandem horizontal arrangement. The mechanical transmission adopts gear transmission and dual electric drives (the main motor and the fixed speed motor are driven separately). This can realize quick change of dies and greatly reduce the auxiliary time during changing.
The base of the drawing machine is a welded structure, which is processed and formed after annealing and eliminating the internal stress with higher stability and strength. The gear box body is divided into two sections, and processed and fromed after annealing and eliminating the internal stress. It uses high-precision helical gear transmission and is equipped with spray-type strong oil cooling and lubrication. With pressure protection, it can realize lubrication failure shutdown, and is equipped with lubrication cooling and filtering device. The cooling box adopts strong spray type lubrication cooling, which can fully cool and lubricate the drawing wheels, dies and wires, so as to ensure better drawing quality. The spray is pumped out by motor pressure, sprayed with the eye mold base horizontal spray drawing wheel. The eye mold base is designed with oblique holes to align the center of the dies, which can effectively clean dies’ center and reduce the loss. The box cover adopts flip structure, which is easy to operate.
4.3 Annealing machine
Our annealing machine adopts the contact short-circuit annealing and has novel structure design. You can choose two-stage annealing or three-stage annealing according to the requirement of wire diameter. The body adopts horizontal welding structure with recovery tank for coolant at the bottom. The conductive wheel set uses the combined structure with copper wheel body and nickel spraying conductive roller. The carbon brush and conductive wheel are concentrated cooled by using powerful fan. Each conductive wheel is driven by a flat belt, and the power is provided by the fixed-speed wheel motor. The annealing power supply is direct current, which is suitable for simultaneous annealing of several copper wires.
The annealing machine is composed of conductive system, oxidation protection system, cooling system, drying system and electrical system. The oxidation protection uses steam protection; the cooling and lubrication uses dilute concentration drawing liquid circulation; the drying system uses compressed air and die drying. It can ensure the appearance of the copper wire is bright and no oxidation, and can also meet the performance requirements of the elongation and resistivity of the copper wire after annealing.